title: Benign mastocytomas.
mesh_terms: D006801:Humans; D007223:Infant; D008297:Male; D012515:Mast-Cell Sarcoma / Q000648:ultrastructure*; D009378:Neoplasms, Multiple Primary / Q000648:ultrastructure*; D012878:Skin Neoplasms / Q000648:ultrastructure*